Lens protection assembly and near-to-eye display device

Abstract

The utility model belongs to the technical field of optical lenses, and discloses a lens protection assembly and a near-to-eye display device. The lens protection assembly comprises a lens frame, an elastic sleeve and a protection sheet, the lens frame is used for being connected with an external device, and a containing groove is formed in the inner wall of the lens frame and can contain and fix a waveguide sheet. The elastic sleeve is arranged in the accommodating groove of the glasses frame, and the elastic sleeve sleeves the peripheral side of the waveguide lens so as to buffer and protect the waveguide sheet. The protection sheet is also arranged in the elastic sleeve, and the protection sheet and the waveguide sheet are arranged at an interval along the axial direction of the elastic sleeve so as to prevent external dust from contacting the waveguide sheet or prevent a user from touching the waveguide sheet by mistake to cause smudginess of the waveguide sheet. The near-to-eye display device comprises an optical machine, the waveguide sheet and the lens protection assembly, can reduce the impact on the internal waveguide sheet when the device falls off, plays a role in buffering and damping, has a good sealing effect, prevents the waveguide sheet from being contaminated, and keeps a good viewing effect.

Description

Technical Field

[0001] This utility model relates to the field of optical lens technology, and in particular to a lens protection component and a near-eye display device. Background Technology

[0002] In recent years, with the increasing maturity and development of new display technologies, more and more small portable projection media players, projection mobile phones or wearable display devices (such as AR / AI glasses) have been launched, making their application modes more diversified and their development prospects highly anticipated. In addition, the number of users of AR and AI glasses is constantly growing.

[0003] However, consumers inevitably encounter situations where AR / AI glasses fall to the ground during use, especially the waveguide lenses, which, being made of optical glass, can break upon impact. Furthermore, fingerprints on the waveguide surface are difficult to remove, requiring protective films to be added to the front and back of the waveguide to prevent direct contact with the surface. This, in turn, creates another problem: poor sealing between the protective film and the waveguide allows dust to enter, resulting in a poor viewing experience. Utility Model Content

[0004] The purpose of this invention is to provide a lens protection component that can reduce the impact on the waveguide sheet when the lens falls, thus playing a role in buffering and vibration reduction, while also having a good sealing effect to prevent dust from contaminating the waveguide sheet.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A lens protection assembly for protecting a waveguide sheet includes: a lens frame for connecting to an external device, wherein the inner wall of the lens frame is provided with a receiving groove for accommodating and fixing the waveguide sheet; an elastic sleeve disposed within the receiving groove of the lens frame and fitted around the periphery of the waveguide sheet; and a protective sheet disposed within the elastic sleeve and spaced apart from the waveguide sheet along the axial direction of the elastic sleeve.

[0007] Preferably, the frame further includes a front frame and a rear frame, which are detachably connected and enclose the receiving groove.

[0008] Preferably, the rear frame is provided with an opening.

[0009] Preferably, the inner peripheral wall of the elastic sleeve is provided with an annular groove.

[0010] Preferably, multiple annular grooves are provided, and the multiple annular grooves are spaced apart along the axial direction of the elastic sleeve.

[0011] Preferably, the elastic sleeve has a through hole located in the annular groove, through which the holdable portion of the waveguide sheet can pass.

[0012] Preferably, two protective plates are provided, located on both sides of the waveguide plate along its axial direction.

[0013] Preferably, the elastic sleeve is a silicone sleeve.

[0014] Preferably, the protective sheet is a transparent lens.

[0015] Another objective of this invention is to provide a near-eye display device that can reduce the impact on the internal waveguide sheet when the device is dropped, thus providing a buffering and vibration reduction effect. It also has a good sealing effect, preventing the waveguide sheet from getting dirty, maintaining a good viewing effect, and improving the device's service life and user experience.

[0016] To achieve this objective, the present invention adopts the following technical solution:

[0017] A near-eye display device includes an optical engine, a waveguide sheet, and a lens protection assembly as described above.

[0018] The beneficial effects of this utility model are:

[0019] The lens protection assembly provided by this utility model includes a lens frame, an elastic sleeve, and a protective sheet. The lens frame is used to connect to an external device, and its inner wall is provided with a receiving groove to accommodate and fix the waveguide sheet. The elastic sleeve is disposed within the receiving groove of the lens frame and is fitted around the periphery of the waveguide sheet to provide cushioning protection. The protective sheet is also disposed within the elastic sleeve and is spaced apart from the waveguide sheet along the axial direction of the elastic sleeve to prevent external dust from contacting the waveguide sheet or user accidental contact causing dirt to the waveguide sheet.

[0020] The near-eye display device of this utility model includes an optical engine, a waveguide sheet, and a lens protection assembly as described above. It can reduce the impact on the internal waveguide sheet when the device is dropped, play a role in buffering and vibration reduction, and also have a good sealing effect to prevent the waveguide sheet from getting dirty, maintain a good viewing effect, and improve the service life and user experience of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the lens protection assembly in an embodiment of this utility model;

[0022] Figure 2 This is a partial cross-sectional schematic diagram of the lens protection component in an embodiment of this utility model;

[0023] Figure 3 This is an exploded view of the lens protection component in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the elastic sleeve in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the frame structure in an embodiment of this utility model.

[0026] In the picture:

[0027] 1. Frame; 11. Front frame; 111. Clearance groove; 12. Rear frame; 121. Opening; 13. Receiving groove; 2. Elastic sleeve; 21. Annular groove; 22. Through hole; 3. Protective plate; 100. Waveguide plate; 101. Holdable part. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] This utility model discloses a lens protection component, which is used to protect the waveguide sheet 100, such as... Figure 1 and Figure 5 As shown, the lens protection assembly includes a frame 1, an elastic sleeve 2, and a protective plate 3. The frame 1 is used to connect to an external device, and its inner wall has a receiving groove 13 to accommodate and fix the waveguide plate 100. The elastic sleeve 2 is disposed within the receiving groove 13 of the frame 1 and is fitted around the periphery of the waveguide plate 100 to protect it circumferentially, providing cushioning and vibration damping. The protective plate 3 is also disposed within the elastic sleeve 2, and is spaced apart from the waveguide plate 100 along the axial direction of the elastic sleeve 2. It can be understood that by applying appropriate pressure to the frame 1 to fix the waveguide plate 100 and the protective plate 3, the elastic sleeve 2 tightly contacts the waveguide plate 100 and the protective plate 3 to form a sealed space, providing dust protection. Furthermore, the protective plate 3 also prevents users from accidentally touching the waveguide plate 100 with their fingers, causing fingerprint contamination and affecting the user's viewing experience. The elastic sleeve 2 not only protects the waveguide sheet 100, but also acts as a buffer and vibration damper for the protective sheet 3, making the structure of the lens protection assembly itself stable and reliable, and extending its service life.

[0033] In some embodiments, such as Figure 3 and Figure 5 As shown, the eyeglass frame 1 also includes a front frame 11 and a rear frame 12, which are detachably connected and enclose a receiving groove 13. It is understood that by configuring the eyeglass frame 1 with a front frame 11 and a rear frame 12, which are detachably connected, it is convenient to install or remove the internal elastic sleeve 2, waveguide plate 100, or protective plate 3, facilitating the replacement of damaged or contaminated lenses. In some specific embodiments, the receiving groove 13 is an annular groove, with annular stepped surfaces on opposite sides of the front frame 11 and the rear frame 12, which meet to form the receiving groove 13. Exemplarily, the eyeglass frame 1 can be made of metal or plastic.

[0034] In some embodiments, such as Figure 2 and Figure 3As shown, the rear frame 12 is provided with an opening 121. It can be understood that when the front frame 11 and the rear frame 12 are connected by a snap-fit ​​mechanism, the opening 121 on the rear frame 12 allows for quick disassembly of the frame by prying it open from the opening 121. Simultaneously, the front frame 11, corresponding to the position of the opening 121, is provided with a flange hole for connecting the mirror frame 1 to external devices; the opening 121 serves to allow for this connection.

[0035] In some embodiments, such as Figure 2 and Figure 4 As shown, the inner peripheral wall of the elastic sleeve 2 is provided with an annular groove 21. It can be understood that by providing an annular groove 21 on the inner peripheral wall of the elastic sleeve 2, the position of the waveguide sheet 100 and the protective sheet 3 can be more stably fixed, and the sealing effect of the periphery of the protective sheet 3 can be improved.

[0036] In some embodiments, such as Figure 2 and Figure 4 As shown, multiple annular grooves 21 are provided, and the multiple annular grooves 21 are spaced apart along the axial direction of the elastic sleeve 2. It can be understood that the number of annular grooves 21 is equal to the number of protective plates 3 and waveguide plates 100. The protective plates 3 and waveguide plates 100 are respectively arranged in different annular grooves 21, so as to achieve individual sealing of each protective plate 3 or waveguide plate 100, and further improve the sealing effect.

[0037] In some embodiments, such as Figure 3 and Figure 4 As shown, a through hole 22 is provided in the annular groove 21 on the elastic sleeve 2, through which the holdable portion 101 of the waveguide sheet 100 can pass. It is understood that, to prevent contamination of the optical display area during installation, the waveguide sheet 100 has a holdable portion 101 outside the optical display area. To allow the waveguide sheet 100 to be smoothly embedded in the elastic sleeve 2, a through hole 22 is provided in the annular groove 21 corresponding to the waveguide sheet 100. The holdable portion 101 of the waveguide sheet 100 can pass through the through hole 22 from the elastic sleeve 2, allowing the optical display area of ​​the waveguide sheet 100 to be properly installed in the annular groove 21. For better sealing, the width and length of the through hole 22 are both smaller than the maximum size of the holdable portion 101 of the waveguide sheet 100. In some optional embodiments, such as... Figure 3 As shown, the front frame 11 has a relief groove 111 at the position of the holdable portion 101 of the waveguide piece 100 after installation, and the holdable portion 101 of the waveguide piece 100 is fitted into the relief groove 111. In addition, by providing a through hole 22, the holdable portion 101 is placed outside the elastic sleeve 2 and fitted into the relief groove 111 of the front frame 11. The rear frame 12 is clamped together with the front frame 11, which can further ensure the stable installation of the elastic sleeve 2 and the internal waveguide piece and protective piece 3.

[0038] In some embodiments, two protective sheets 3 are provided, located on both sides of the waveguide sheet 100 along its axial direction. It is understood that protective sheets 3 are provided at least on the outer side of the waveguide sheet 100 to prevent external dust and accidental user contact. The number of protective sheets 3 on the same side of the waveguide sheet 100 should not be excessive, so as not to affect the light transmittance and generate excessive refraction and reflection, thus affecting the display effect. Therefore, providing two protective sheets 3, respectively located on both sides of the waveguide sheet 100 along its axial direction (i.e., the inner and outer sides), ensures good sealing and protection of the waveguide sheet 100 without affecting the display effect, guaranteeing a good viewing experience for the user.

[0039] In some embodiments, the elastic sleeve 2 is a silicone sleeve. Silicone is stretchable, making installation convenient, and it is corrosion-resistant, anti-aging, non-toxic, odorless, and safe for contact with human tissue. The material properties of silicone allow it to maintain good flexibility even in high and low temperature environments, providing cushioning. When the glasses fall, it can cushion and reduce the impact of the fall. The protective sheet 3 and the waveguide sheet 100 can maintain a long-term seal within the silicone sleeve, resulting in a good sealing effect.

[0040] In some embodiments, the protective sheet 3 is a transparent lens. Exemplarily, the protective sheet 3 is made of optical resin material or a transparent acrylic sheet with optical properties to avoid affecting the imaging display effect of the waveguide sheet 100.

[0041] This invention also provides a near-eye display device, including an optical engine, a waveguide 100, and a lens protection assembly as described above. This reduces the impact on the internal waveguide 100 when the device is dropped, providing cushioning and shock absorption. It also provides a good sealing effect, preventing the waveguide 100 from becoming dirty, maintaining a good viewing experience, and improving the device's lifespan and user experience. It is understood that during use, the near-eye display device of this invention, through the sealing effect of the elastic sleeve 2 and the protective sheet 3, can effectively prevent dust from entering and contaminating the waveguide 100. Even if the user accidentally drops the device, the elastic sleeve 2 inside the frame 1 can provide shock absorption and cushioning, effectively protecting the lens.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A lens protection assembly for protecting a waveguide sheet (100), characterized in that, include: A frame (1) is used to connect to an external device. The inner wall of the frame (1) is provided with a receiving groove (13) which can accommodate and fix the waveguide sheet (100). An elastic sleeve (2) is disposed in the receiving groove (13) of the frame (1), and the elastic sleeve (2) is sleeved on the periphery of the waveguide sheet; A protective sheet (3) is disposed inside the elastic sleeve (2), and the protective sheet (3) is spaced apart from the waveguide sheet (100) along the axial direction of the elastic sleeve (2).

2. The lens protection assembly according to claim 1, characterized in that, The frame (1) also includes a front frame (11) and a rear frame (12), which are detachably connected and form the receiving groove (13) by the front frame (11) and the rear frame (12).

3. The lens protection assembly according to claim 2, characterized in that, The rear frame (12) is provided with an opening (121).

4. The lens protection assembly according to claim 1, characterized in that, The inner peripheral wall of the elastic sleeve (2) is provided with an annular groove (21).

5. The lens protection assembly according to claim 4, characterized in that, The annular groove (21) is provided in multiple ways, and the multiple annular grooves (21) are spaced apart along the axial direction of the elastic sleeve (2).

6. The lens protection assembly according to claim 4, characterized in that, The elastic sleeve (2) has a through hole (22) located in the annular groove (21), and the holdable part (101) of the waveguide sheet (100) can pass through the through hole (22).

7. The lens protection assembly according to claim 1, characterized in that, Two protective plates (3) are provided, located on both sides of the waveguide plate (100) along its axial direction.

8. The lens protection assembly according to any one of claims 1-7, characterized in that, The elastic sleeve (2) is a silicone sleeve.

9. The lens protection assembly according to any one of claims 1-7, characterized in that, The protective sheet (3) is a transparent lens.

10. A near-eye display device, characterized in that, It includes an optical engine, a waveguide sheet (100), and a lens protection assembly as described in any one of claims 1-9.

Images